original 266-4387 Diesel Engine Fuel Injector for C3500 3508 3512 3516 Construction Machinery Parts Replacement for OEM 2664387 20R-1277 original new injector

Engineered for demanding heavy-duty operations, the 266-4387 diesel fuel injector delivers OEM-grade performance for 3500 Series engines used across mining, marine, and power generation industries. This injector assembly is manufactured from high strength alloy steel to withstand extreme in-cylinder pressures, high combustion temperatures, and continuous-duty load cycles typical of prime power and standby generator applications. Precision fuel metering and an optimized spray pattern ensure efficient atomization, stable fuel delivery, and reduced fuel consumption across the full operating range.

This unit serves as a direct OEM replacement and is fully cross-referenced with 386-1772, 392-0220, 20R-1281, 250-1311, 373-4087, 376-0509, and 392-0212. It is compatible with 3508B, 3508C, 3512B, 3512C, 3516B, 3516C, and 3524B engines powering marine propulsion systems, offshore drilling platforms, haul trucks, oilfield equipment, industrial compressors, and continuous-duty power plants. Corrosion resistance and extended service life make it suitable for harsh operating environments including saltwater exposure and high-dust mining conditions.

For optimal performance, use clean diesel fuel, replace filters regularly, and monitor fuel system pressure. Installation requires cleaning the mounting bore, fitting new seals, torquing to specification, bleeding the fuel system, and performing a leak test. Periodic inspection helps prevent nozzle wear, injector blockage, and atomization issues that can cause black smoke, power loss, or hard starting in critical industrial applications.